Obama arrives by helicopter

President Barack Obama (right) is escorted to his waiting limousine after arriving by helicopter next to McCormick Place in downtown Chicago. Obama is in town to cast his vote early for the upcoming election.

President Barack Obama (right) is escorted to his waiting limousine after arriving by helicopter next to McCormick Place in downtown Chicago. Obama is in town to cast his vote early for the upcoming election. (Brian Cassella, Chicago Tribune)

President Barack Obama (right) is escorted to his waiting limousine after arriving by helicopter next to McCormick Place in downtown Chicago. Obama is in town to cast his vote early for the upcoming election.Brian Cassella, Chicago Tribune